After showing little sign of slippage last year in his established role as a key special-teams player, 49ers wide receiver Kassim Osgood agreed to terms on a one-year contract with the team Monday, a league source said.

In his first season with the 49ers, Osgood, who will turn 34 in May, flashed the form that made him a Pro Bowler in 2006, 2007 and 2009. According to statistics compiled by the coaching staff, he ranked fourth on the team in special-teams tackles (12), and first in "big plays" (16), one of which was a blocked punt in a home win against the Seahawks. Osgood compiled those numbers in 14 games.

The 49ers, who ranked 31st covering kickoffs in 2012 (26.9 yards per return), improved to fifth in that category last year (20.4) and were 13th in covering punts (8.7). Last week, the 49ers lost one of their core special-teams players when running back Anthony Dixon signed with the Bills.

Osgood, who has 17 receptions since 2004, is not expected to be a factor on offense. Last year, he had one catch - his first since 2011 - and played 45 offensive snaps.

Osgood probably will receive a base salary of $955,000 in 2014, the minimum for a player with at least 10 years of experience. With the veteran minimum-salary benefit, Osgood's salary-cap hit will be that of a second-year player: $570,000.

The 49ers have three remaining unrestricted free agents: quarterback Colt McCoy, center Jonathan Goodwin and cornerback Perrish Cox. They are not expected to re-sign McCoy or Goodwin, but Cox remains a possibility.

Net comp pick: One year after his exit, safety Dashon Goldson is still contributing to the 49ers.

Thanks partly to the loss of the two-time Pro Bowler in free agency last year, the 49ers received a third-round compensatory draft pick, No. 100 overall, in May's draft.

The allocation of compensatory picks is based on a formula that involves teams' free-agent gains and losses from the previous year. In 2013, the 49ers lost notable names in Goldson and tight end Delanie Walker in free agency. Nose tackle Glenn Dorsey and placekicker Phil Dawson were among their notable signings.

The 49ers have 11 draft picks, including six of the first 100 selections. They entered the draft with 12 picks in 2011 and selected 10 players. They had 13 picks in 2013 and selected 11 players.